Use process_singleton_linux on Mac.

chrome/chrome_tests_unit.gypi

Index: chrome/chrome_tests_unit.gypi
diff --git a/chrome/chrome_tests_unit.gypi b/chrome/chrome_tests_unit.gypi
index 6b6eafdec139f8fba7632f437b633e17f07d9cdd..878f38ea006b5b947b7800e4e04fb15b17912d84 100644
--- a/chrome/chrome_tests_unit.gypi
+++ b/chrome/chrome_tests_unit.gypi
@@ -1167,8 +1167,7 @@
         'browser/printing/print_preview_test.cc',
         'browser/printing/print_preview_test.h',
         'browser/process_info_snapshot_mac_unittest.cc',
-        'browser/process_singleton_linux_unittest.cc',
-        'browser/process_singleton_mac_unittest.cc',
+        'browser/process_singleton_posix_unittest.cc',
         'browser/profile_resetter/automatic_profile_resetter_delegate_unittest.cc',
         'browser/profile_resetter/automatic_profile_resetter_unittest.cc',
         'browser/profile_resetter/jtl_interpreter_unittest.cc',
@@ -2468,6 +2467,7 @@
             'browser/policy/policy_path_parser_unittest.cc',
             'browser/profiles/off_the_record_profile_impl_unittest.cc',
             'browser/profiles/profile_list_desktop_unittest.cc',
+            'browser/process_singleton_posix_unittest.cc',

[Scott Hess - ex-Googler, 2014/04/14 19:21:33]

c before f, except after ... no, always c before f!

[jackhou1, 2014/04/17 07:55:54]

Done.

             'browser/renderer_context_menu/render_view_context_menu_unittest.cc',
             'browser/search/instant_service_unittest.cc',
             'browser/search/search_unittest.cc',